Boiler-brace.



No.'"653;000. Patented July 3; I900. P. F. nunnou.

BOILER BRACE.

(Application filed Mar. 19, 1900.)

(No Model.)

Fig: I

with/cameo "m: Nonms Farms co. FHOYO-LIYHQ, WASNINOTON. u. c.

UNITED STATES ATENT Fries.

PATRICK F. DUNDON, OF SAN FRANCISCO, CALIFORNIA.

BOILER=BRACE.

SPECIFICATION forming part of Letters Patent No. 653,000, dated July 3,190( Application filed March 19, 1900- Serial No- (N 11101161) I To allwhom, it may concern.-

Be it known that I, PATRICK F. DUNDoN, a citizen of the United States,residing at San Francisco, county of San Francisco, and State ofCalifornia, have invented certain new and useful Improvements inBoiler-Braces, and I hereby declare the following to be a f u'll, clear,and exact description of ths same, reference being had to theaccompanying drawings, forming a part of this specification.

My invention relates to braces or stays,'es-

- pecially for steam-boilers, and to certain improvements therein.

My improvement consists in forming such stays from a plate or strip ofmetal of uniform section split at both ends and bent outward into feetor lugs that receive rivets set equi distant on each side of the line ofthe brace and to strains thereon, so the full strength of each rivet isattained.

The object of my invention is to provide a brace or stay made from asymmetrical piece of metal of uniform section, simple and easy tomanufacture, and held by rivets, each and all of which equally sustainstrains falling upon the brace or stay. To this end I construct stays orbraces as shown in the drawings herewith, forming a part of thisspecification.

Figure I shows a plane view of a strip or plate of metal as firstprepared for my improved braces. Fig. II is a sideview of the same braceafter it is bent, folded, and the lugs turned. Fig. III is a plan or topview of Fig. II. Fig. IV is a section on the line a a in Fig. II. Fig. Vshows the manner of applying the brace in a common steam-boiler.

In the construction of braces or stays of the class to which myinvention pertains it is customary to alter and reinforce the sectionsby forging and also to cut them away in their middle portions, leavinglateral lugs at one or both ends.' Also it is common to employ at one orboth ends two or more rivets set successively in the line of strain.

By my improvement the blank or plate of metal 1 of which the brace isformed is a plain parallel section that is punchedwith holes 2 toreceive the rivets 8 and is slit at the'ends, as shown at 9 in Fig. 1.

tion accomplished with simple -apparatus such as is common inplate-working. The

This is the first operaw next operation is to fold the body of the braceinto a section, as shown in Fig. IV, and at the same time turn outwardthe lugs 3 and 4, as shown in Fig. III. This completes the brace orstay.

The manner of attaching the braces in a common steameboiler is shown inFig. V, where 5 is a portion of a circular boiler-shell, 6 the headthereof, and 7 one of myimproved braces attached by two rivets 8 at eachend, so that each rivet and each lug sustain an equal strain. In thismanner it will be seen that the stay or brace can be made with itsseveral membersthe body, lugs,and rivetsof equal strength, by which agreater value is attained and no metal is wasted.

It will be apparent that while I have described my improvement asrelating especially to boiler braces or stays the same construction issuitable for staying or bracing the corners of any kind in plate metalstructures. 1

Having thus explained'the nature and objects of my invention and themanner of making and applying the same, what I claim as new, and desireto secure by Letters Patent, 1s

1. A brace or stay of the character described,

slit at the ends to form two lugs, these latter bent outward to formfootings at each end of the brace, equally at each side, and to suit theangles of thefaces to which the brace is attache'd, substantially asspecified and shown.

2. A brace or stay made of plate metal of uniform thickness and width,slit to form two lugs at each end, rivet-ways in each lug in likerelation to the line of the brace and to sustain an equal strain,substantially as described.

3. A brace orstay made of plate metal, slit at the ends to form lugs4,turned outward from the inside of the folded plate, and lugs 3 at theother end spread in an opposite plane, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

PATRICK F. DUND ON.

